#!/usr/bin/perl -w

=head1 NAME

BackupPC_recover_from_increments

=head1 DESCRIPTION

quick hack to create BackupPC pool out of increments

=head1 SYNOPSYS

 BackupPC_recover_from_increments /restore/from/directory/ [/path/to/increment/to/restore.tar.gz ... ]

=head1 HISTORY

2006-02-07 Dobrica Pavlinusic <dpavlin@rot13.org>

=cut

use File::Find;
use Data::Dumper;

use lib "/data/backuppc/lib";
use BackupPC::Lib;

# connect to BackupPC_server

die("BackupPC::Lib->new failed\n") if ( !(my $bpc = BackupPC::Lib->new) );
my %Conf = $bpc->Conf();

$bpc->ChildInit();

my $err = $bpc->ServerConnect($Conf{ServerHost}, $Conf{ServerPort});
if ( $err ) {
    print("Can't connect to server ($err)\n");
    exit(1);
}

my $TopDir = $bpc->TopDir();

print Dumper(\%Conf);

# create restore host configuration

my $restore_path = "$TopDir/$temp/restore.tar.gz";

my $conf_restore = <<'_END_OF_CONF_';

$Conf{XferMethod} = 'tar';

$Conf{TarFullArgs} = 'echo "full backups are not supported in restore!" ; exit 1';
$Conf{TarIncrArgs} = '';

# fake ping when restoring
$Conf{PingCmd} = '$pingPath -c 1 localhost',

$Conf{TarClientCmd} = 'zcat __restore_path__';

1;

_END_OF_CONF_

$conf_restore =~ s/__restore_path__/$restore_path/gs;

my $config_file = "$bpc->{TopDir}/conf/restore.pl";

open(my $host_fh, '>', $config_file) || die "can't open $config_file: $!";
print $host_fh $conf_restore || die "can't write configuration in $config_file: $!";
close($host_fh) || die "can't close $config_file: $!";

warn "written config:\n$conf_restore\n";

sub restore_increment {
	my $path = shift || die "need path!";

	print "working on $path\n";

	if (-e $restore_path) {
		unlink $restore_path || die "can't remove $restore_path: $!\n";
	}
	link $path, $restore_path || die "can't create link $path -> $restore_path: $!\n";

	$bpc->ServerMesg("log User backuppc started restore of $path");

	my $full = 0;
	my $r = $bpc->ServerMesg("backup restore restore backuppc $full");
	print "backup --> $r";

	# Status_backup_in_progress
	# Status_idle

	my ($state,$last_state) = ('','x');

	while ($state ne 'Status_idle') {
		my $s = $bpc->ServerMesg("status hosts");
		my %Status;
		{
			eval "$s";
		}
		$state = $Status{restore}->{state};
		if ($state ne $last_state) {
			print "\n$state"; #, Dumper($Status{restore});
		} else {
			print ".";
		}
		$last_state = $state;
		sleep 1;
	}
	print "\n";
}

# now, start restore

foreach my $restore_inc (@ARGV) {

	if (-d $restore_inc) {

		find({ wanted => sub {
			restore_increment( $File::Find::name );
		}, follow => 0 }, $restore_inc);

	} elsif (-f $restore_inc && $restore_inc =~ m/\.tar\.gz$/i) {
		restore_increment( $restore_inc );
	} else {
		warn "skipped: $restore_inc, not directory or .tar.gz increment\n";
	}

}

#unlink $config_file || die "can't remove $config_file: $!";